float MUST_USE_RESULT Quat::AngleBetween(const Quat &target) const
{
assume(this->IsInvertible());
Quat delta = target / *this;
delta.Normalize();
return delta.Angle();
}
float3 MUST_USE_RESULT Quat::SlerpVectorAbs(const float3 &from, const float3 &to, float angleRadians)
{
if (angleRadians <= 0.f)
return from;
Quat q = Quat::RotateFromTo(from, to);
float a = q.Angle();
if (a <= angleRadians)
return to;
float t = angleRadians / a;
q = Slerp(Quat::identity, q, t);
return q.Transform(from);
}
float Quat::AngleBetween(const Quat &target) const
{
assume(this->IsInvertible());
Quat q = target / *this;
return q.Angle();
}